Door hinge



Sept. 19, 1933. M. HIRAKAWA DOOR HINGE Filed Sept. l0, 1951 3 Sheets-Sheet l www ` Sept 19 .1933 M. HIRAKAWA 1,927,778

DOOR HINGE Filed sept. 1o, 1931 3 sheetshsheet 2 351g @Mom/#Ms www Sept. 19, 1933. M. HIRAKAWA DOOR HINGE Filed Sept. l0 1951 3 Sheets-Sheet i -l A,

vwemtoz 777 #ML/PAW@ 12* @lifter/14u35 Patented Sept. l.19, 1933l i, l 1 I d n UNI-TED STATES PATENT Dooru HINGE Masanori Hirakawa, Ebara-fGun, I Tokyo Prefecture, Japan Application September 10, 1931,.r Serial No.v 562,148, andin Japan January 23, 1931 Y 2 Claims. (Cl. 16-54)' This invention relates to improvements indoor fixed parts 2 and 3 and the rotatablecylinder 5 hinges in which the part attached to the door is thus form Vtogether a hinge unit. The rotatable formed from a one piece cylinder adapted to cylinder 5 is divided bya partition 6 into up receive oil and is provided with an internal helical per and lower chambers, the lower chamber hav- 5 projection. In the cylinder is a helically grooved ing*y a coiled spring 7 contained therein, whose 60 body having an oil control piston connected there-k top end thereof is secured vto the -partition 6, to,-the body being moved in opposite directions while the lower end is secured to a'locking plug along an axial guide member rigidly ixed to the 8 of the'fixed part 3 formed integrally with the xed part of the hinge which is attached to the plate 1. This spring is, however, not an important door post. The piston is provided with 'an oil pas-Y part oi Athe invention and maybe fitted a de- 65 sage'having a non-return valvefwhich opens only sired position outside the hinge if desired. In when the door is opened and is further provided such case the lower chamber may be omitted. In with a throttledV passage regulated by-a needle .the upper chamber 9 lying above the partition 6, valve, so that the door is returned to its closed there is arranged a helically grooved body 10 toposition at a reduced velocity due to the throttled gether with a piston 11 secured'to the latter. The 70 flow of the oil. The invention also includes a helical groove `1li-of the bodylO engages'with'a 4set of such new door hinges connected together projection 14 formedintegrally with the cylinder-,- by means of a connecting plate. The object of the or suitably securedthereto. The bore of the invention is to propose a new door hinge of great body vlllhas opposed internal recesses 16.v e Y 2U buiering action, while its construction is simple The plug 17 fis Xed-in the upper short cyl- 75 andthe operation is very steady and accurate. inder 2 and'isformed with an' extensionfor an In the accompanying drawingszaxialv guide member 18 provided with longitudinaly Fig. 1 is a vertical section of one embodiment ribs 19, which are adapted to engage with the of a hinge according to the invention for use in said recesses 16 of the body 10, allowingthe latter a door to be opened from one side; p to movefonly axially relative tothe locking plug 80 Fig. 2 is a section along the line II-II of Fig. 1; 17. For -this reason, if Vthe door 20V secured to Figs.-3 and 3e denote a helically grooved body;V the plate 4 is turned by operating a handle (not being an elevation and Aa plan thereof respecshown) in the direction vof an arrow to the positively; l tion indicated by the dotted lines 20", the body Y10 Figs. 4 and 4a show, respectively, an elevation rises from the position shown in Fig. 1, and con-'85 in plan of a guiding element for the helically sequently' the piston llpsecured tothe body'llO grooved body, located at the yupper part of the ascends within the chamber 9.' l y f hinge; 21 and 22 are suitable packing rings. y

Figs. 5 and 5a show, respectively, an `elevation The piston haseacentral oil passage`23,a transand side View of a needle valve; Y verse oil passage 24, and also'a longitudinal oil' Figs. 6 and 6a show respectively, a side view passage 25. The extentof opening ofthe central and top view of an adjusting piece for the needle passage 23 is regulable by means of a needle valve valve, A and B being an elevation and side View 26, and the oil passage 25 is opened and shut by thereof respectively; a non-return valve or a `ball valve 27. `The bar Fig. 7 is an elevation, partly in section, of a 28 is for retaining the valve 27 in its valve chamhinge for a door to be opened in two sides; ber.

Fig. 8 is a plan view showing the position of The valve spindle of the needle Valve 26 conthe door when it is opened; and sists of a helically threaded part 29 and a flat Fig. 9 is a section showing a modification of a part 30, both of which pass through the central l cylindrically shaped piston chamber employed hole 31 of the locking plug 17, and the threaded 100 in this invention. part 29 engages internal threads of the central Throughout all the drawings the same referhole 31, and the flatpart 30 is inserted into a flat ences denote the same or corresponding parts. longitudinal slit 33 of a needle valve regulating Referring to Figs. 1 to 6a, 1 is a metal plate semember 32 inserted in the locking plug 17.` The cured to the door post 1x and provided with short member 32 has a collar 34, by means of which it 105 cylindrical part 2 and short supporting part 3 is positioned in the dilated part 3,5 of the central at the upper and lower ends respectively. 4 is hole 31, a recess 36 being provided at the head a movable metal plate to be secured to the body of the member 32. f l of a door and provided with a one piece cylinder If, therefmp, the member 32 iS rotated by 110 5 extending between the Xed parts 2 and 3. The means of a suitable tool engaging the recess 36, v

the parts 29 and 30 forming the valve spindle Yare alsovmoved, and according'to this movement the valve spindle slides up and down along the` door-above explained with reference to Figs. 1

to 6, is as follows:

Referring to Fig. 2, when the door 20 is opened.` in the direction of the arrow :u against the action of the spring 7, the piston 11 ascends, and the oil contained in thechamber 9 above the piston passes through the passage v andfinto the part 9 of the chamber 9 beneath the piston, and on the maximum opening of the door the piston attains its highest position. When however the doorl isthen left free from the force to open the door, Ythe spring 7 acts to return piston to its original or lowest position so that the door returns also '.to Aits originalV position. Duringthe descentof the piston the passage 25 is'closed up by the ball valve 27, with the result that the oil of the chamber 9" enters the chamber' through the throttled oil passages Y23 and 24, and returns at a reduced velocity to its closed position buffered by ,thethrottled flow of the oil. This oil throttling` action of the passages 23 and 24 is regulable by means of the needle valve 26.

y,It is .to be understood that in the example above shown, theextent of Opening of the door will be determined Vby the length of the stroke of the helical body 10,` and this extent shown in the embodiment is 180.

Figs. 7j and Bshow one example ofthe hinge` for use in a door to be opened in two sides. In the gures, 1 is a lfixed plate, 1 a door post for securing the platey l, and 20 a door. A is the first hinge,land B the second hinge. Both the hinges are connected by a member 37. The door attached to the plate 4 can be opened in a direction shown Y' J by an arrow y up to the position of the door shown in 20'-A around the aXisof the hinge A.V The doorcan also be opened in a reversed direction shown by/an larrow z up to theposition of the door shown-in 20,and indeed around the axisnof'the i hinge B. 5oL

In` the exampleshown in Figs. 7 and v8, the spring is not contained Within thehinge. Here it is to be noted-,that the spring will be provided at a suitable place between the door and the xed A'door post.

`In Fig. 9 illustrating a modification of the piston chamber, the latter is not of acylindrical shape of the same diameter throughout the length,but consists of a cylinder having upper 'is shut up energetically impinging on the doorkoriginal position automatically in a reduced veand lower parts of a vgreater diameter than the middle part conforming to the piston. By this arrangement, the door, von returning to its original position, moves'rapidly for a certain length of time. However, thereafter it receives a buffery action due to the oil throttling so that the movement is ybraked to a suflcient degree, and iinally when the oil-flow is brought ,to Zero, the door frame in a similar manner as if the door is shut up forcibly by the hand.

Briefly, the invention makes it 4possible to obtain a door hinge, whichis of a very simple construction and capable of returning to the locity, that is, undera braking or buffer action of adjustable orV desired extent. V4What I claim is:

1. A hinge for doors comprising la fixed plate, a one piece cylinder rotatably connectedwith the fixed plate, a plug fixed with the plate and having ,an extension depending into the cylinder, a

.cylindrical body slidably interlocked with the extension, interengaging means betweenthe cylinder and body to slide the body in one Vdirec-l tion upon swinging of the door to its open position, a piston fixed to and movable with the body, said piston having passages therein for by-pass- `ing uid contained in the cylinder from one face of the piston to the other, a needle valve cooperative with one of the passages, a member disposed axially n the body, and slidably interlocked with the needle valve for adjusting .the same, and yieldable means operating in opposition t the opening movement of the door to slide rection. y

2. A hinge-for doors comprising afixed plate, a cylinder rotatably lconnected withv the platea plug xed to the plate and `having annextension115 depending into the cylinder, ribs onthe extension, a cylindrical bodyin the vcylinder having grooves therein for slidably engaging the ribs,.said.. body having a helical vgroovev formed therein, helical projections in the cylinder engaging the groove, a piston fixed `to and movable with the body, said piston yhaving oil passages to Vpermit passage of oil contained in the cylinder from one face of the piston to the other, a needle -valve extending axially through the body Yfor control-y ling the flow of oil through one Apassage of thev piston, a member rotatable in the plug and extension and having a longitudinal slot therein for slidably interlocking the needle valve and mem- ,1.36 ber, and means forvrotating the member to ado just the position of the needle valve.

lviAsANoRi,'HIRAKAWAy A i*- the bodyand thus the piston in an opposite di- 

